removal of the virtual keypad

1-open the jar file on your pc with winrar 

2- go to the folder META-INF

3- open the file MANIFEST.MF using any editor(notepad)

...ADD THIS LINE TO IT
" MIDlet-Touch-Support: true "
WITHOUT QUOTES 

save the file by pressing Ctlr +S on your keyboard then 
winrar asks you update archive you say yes and here you 
go you just made your app full screen

You are Done...............